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b2MouseJoint Class Reference

#include <b2MouseJoint.h>

Inherits b2Joint.

Public Member Functions

b2Vec2 GetAnchorA () const
 Implements b2Joint.
b2Vec2 GetAnchorB () const
 Implements b2Joint.
b2Vec2 GetReactionForce (float32 inv_dt) const
 Implements b2Joint.
float32 GetReactionTorque (float32 inv_dt) const
 Implements b2Joint.
void SetTarget (const b2Vec2 &target)
 Use this to update the target point.
const b2Vec2GetTarget () const
void SetMaxForce (float32 force)
 Set/get the maximum force in Newtons.
float32 GetMaxForce () const
void SetFrequency (float32 hz)
 Set/get the frequency in Hertz.
float32 GetFrequency () const
void SetDampingRatio (float32 ratio)
 Set/get the damping ratio (dimensionless).
float32 GetDampingRatio () const
void Dump ()
 The mouse joint does not support dumping.
void ShiftOrigin (const b2Vec2 &newOrigin)
 Implement b2Joint::ShiftOrigin.
- Public Member Functions inherited from b2Joint
b2JointType GetType () const
 Get the type of the concrete joint.
b2BodyGetBodyA ()
 Get the first body attached to this joint.
b2BodyGetBodyB ()
 Get the second body attached to this joint.
b2JointGetNext ()
 Get the next joint the world joint list.
const b2JointGetNext () const
void * GetUserData () const
 Get the user data pointer.
void SetUserData (void *data)
 Set the user data pointer.
bool IsActive () const
 Short-cut function to determine if either body is inactive.
bool GetCollideConnected () const

Protected Member Functions

 b2MouseJoint (const b2MouseJointDef *def)
void InitVelocityConstraints (const b2SolverData &data)
void SolveVelocityConstraints (const b2SolverData &data)
bool SolvePositionConstraints (const b2SolverData &data)
- Protected Member Functions inherited from b2Joint
 b2Joint (const b2JointDef *def)

Protected Attributes

b2Vec2 m_localAnchorB
b2Vec2 m_targetA
float32 m_frequencyHz
float32 m_dampingRatio
float32 m_beta
b2Vec2 m_impulse
float32 m_maxForce
float32 m_gamma
int32 m_indexA
int32 m_indexB
b2Vec2 m_rB
b2Vec2 m_localCenterB
float32 m_invMassB
float32 m_invIB
b2Mat22 m_mass
b2Vec2 m_C
- Protected Attributes inherited from b2Joint
b2JointType m_type
b2JointEdge m_edgeA
b2JointEdge m_edgeB
int32 m_index
bool m_islandFlag
bool m_collideConnected
void * m_userData


class b2Joint

Additional Inherited Members

- Static Protected Member Functions inherited from b2Joint
static b2JointCreate (const b2JointDef *def, b2BlockAllocator *allocator)
static void Destroy (b2Joint *joint, b2BlockAllocator *allocator)

Detailed Description

A mouse joint is used to make a point on a body track a specified world point. This a soft constraint with a maximum force. This allows the constraint to stretch and without applying huge forces. NOTE: this joint is not documented in the manual because it was developed to be used in the testbed. If you want to learn how to use the mouse joint, look at the testbed.

The documentation for this class was generated from the following files: